How to express a value between 0 and 1 by converting it into an actual number

Question

I apply 21 input data and 1 output data. for example, I want that output results are

2.82 2.92 2.84 2.79 2.53 2.47 2.47 2.49 2.52 2.58 2.66 2.64 2.64 3.03 2.84 2.66 2